[4/21] Fix o_cputype for 64-bit XCOFF objects

[Nick Clifton]

Hi Richard,

> bfd/
> 	* coff64-rs6000.c (xcoff64_write_object_contents): Set the cputype
> 	to 2 for bfd_mach_ppc_620.

Approved - please apply.

Cheers
   Nick